Riveting-machine.



0. A. ANDERSON. v RIVETING MACHINE.

APPLICATION FILED MAY 17, 1909.

945,670,- Patented Jan. 4, 1910.

2 SHEETS-SHEET l.

0. A. ANDERSON. RIVETING MACHINE. APPLICATION FILED MAY 17, 1909.

2 slums-31mm 2.

Patented Jan. 4, 1910.

UNITE NT UFFICE.

OSCAR A. ANDERSON, OF CHICAGO, ILLINOIS.

RIVETING-DIACHINE..

To all whom it may concern:

Be it known that I, OSCAR A. ANDERSON, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Riveting-Machines, ofwhich the following is a specification.

My invention relates to machines for assembling parts of folding'rulersand has particular reference to the mechanism for inserting andtemporarily fastening the joint-rivets or pivots thereof.

The object of the invention is to provide a simple and rapidly operablemachine for fastening together the pivoted sections of a pocket rule andthe like in such a manner as to obviate waste of time and loss ofmaterial usually occasioned in the ineflicient assembling of rulersections prior to the permanent riveting or heading of the joint pivots,and the invention consists in the novel construction, combination andarrangement of parts hereinafter described in detail, illustrated in thedrawings and incorporated in the appended claims.

In the drawingsFigure 1 is a plan view of a machine embodying myinvention same being partly in section. Fig. 2 is a vertical section ofthe driving mechanism. Fig. 3 is a section taken on line 33 of Fig. 2.Figs. 4 and 7 are enlarged detail views. Fig. 5 is a section takensubstantially on line 5-5 of Fig. 3. Fig. 6 is a section taken on line66 of Fig. 1.

Referring in a general way to Fig. 1, 2 represents the base of themachine, which is substantially a fiat plate forming a right angle andadapted to be placed on a table top or bench. Fig. 2 and the upperportion of Fig. 1 represent an adjustable driving mechanism which is setin motion by stepping on a treadle and stops automatically at the end ofeach complete operation of checking or slightly heading the ends of ajoint rivet, which operation is completed during one complete revolutionof the driving shaft. The rivet-checking mechanism receiving power fromsaid driving mechanism, is represented by the lower portion of Fig. 1.In the latter is shown a yieldingly mounted spindle, pin or finger 3 thediameter of which is substantially that of a joint-pivot or rivet. Uponthis spindle the rule-sections to be pivoted together are temporarilymounted or joined while the machine inserts Specification of LettersPatent.

Application filed. May 17, 1909.

Patented J an. 4, 1910.

Serial No. 496,614.

a permanent rivet r pivot which replaces said spindle or temporary pivotby pushing it out of the rivet holes in the rule sections. l/Vhen therivet is entirely through the oint the spindle 3 has reached the end ofits movement and its forcible resistance then checks or dents orslightly heads that end of the rivet with which it contacts while theopposite end of the rivet is similarly operated upon by a somewhatsimilar rivet-pushing spindle alined with said spindle 3 the outer endof which is mounted in a bore of a socket-piece or rivet-holdingmember 1. The rule sections are represented by the numerals 6 and 6' andthe spindle which cooperates with the spindle 3 in slightly heading thepivot is represented by the numeral 7 and its outer end is shown mountedin the bore 5 of the socket piece 4, the outer, or unoccupied portion,of said bore 5 being a receptacle for the permanent rivet while it isbeing inserted in the rule joint.

Referring, now, in detail to the construction of the checking device andits driving mechanism as shown in the different views, the spindle 3 ismounted in a bearing composed of an upper plate 8 and a lower platesubstantially similar, not shown specifically but substantiallyrepresented in Fig. 6 by the plates marked therein 8 and 9. In Fig. 1the plate 8 and its counterpart represented by the plate 9 in Fig. 6,are secured together by screws 10. These bearing plates are hollowed outso as to form between them.

a bore 11 the outer or lower end of which is closed by a cylindricalstop 13, or a plug provided with threads 15 which engage threads 16 in acounterbored portion 1a of the bore 11. Within the latter and securelymounted on the spindle 3 is a cylindrical enlargement or stop 12 throughwhich the spindle 3 is continued rearwardly of said stop 12 in the formof a guide spindle 18 movable in a bore 19 in the plug 13 the threadedportion of which is provided with a screw driver slot 17 with the aid ofwhich the plug 13 may be turned in or out to vary the extent of movementof the spindle 3, or the point of contact and arrest of movement of itsstop 12. In the bore 19 of the plug 13 is seated a spiral spring 20 andthe upper end of said spring is coil-ed around the guide spindle 18. Theextreme upper end of said spring bears against the stop 12 of thespindle 3 and normally supports the latter in its projected positionready to receive thereon the rule sections, as shown in Fig. 1. Thespindle 18 supports that portion of the spring 20 which projects out ofthe bore 19, against lateral displacement and thus guides the upper endof the spring into the bore when the spring is compressed during themovement when the spindle 3 is displaced by a permanent pivot or rivet.

The rivetholder, or socket member 4, together with its immediatemountings is carried upon a cross-head 21 having sidebearings 22 and 23slidably mounted in grooves or channels 24 and 25 formed between theplatcs S and 9 by rabbeting their inner adjacent edges as shown in Fig.6. The rivet-holder & is mounted in a horizontal bore 28 in a hub 27projecting from a cap 26 secured by screws 31 to the forward end of thecross-head 21. The rivet-holding member 4- is mounted. in a mannersimilar to the spindle 3, its inner end 29 being enlarged and serving asa stop limiting the outward movement of the rivet-holder. The outer endof the bore 28 is reduced to correspond with the size of the socketportion of the rivet-holding member at and between the reduced portionof the bore 28 and that portion in which the stop 29 is located anannular shoulder 30 is formed against which the stop portion 29 normallyrests and is supported against the pressure of a spiral spring 33.

The spindle 7 is rigidly mounted in the cross-head 21, its inner endbeing an en larged threaded portion 32 having threaded engagement with athreaded bore in the bottom of the bore 28. The spring 33 is coiledaround the inner end of the spindle 7 and bears, respectively, againstits enlarged inner end and against the stop 29 on the rivet-holder lwhich is thus, like the spindle 3, normally held projected under springpressure so that its outer end extends beyond the tip of the spindle 7and leaves a space beyond said tip in the bore 5 to be temporarilyoccupied by a rivet.

To a pivot-lug 3%. on the rear end of the cross-head 21 is pivoted oneend of a pitman The opposite end of said pitman is pivoted to awrist-pin 36 adjustably mount ed, in a manner to be hereinafterdescribed, to vary the length of its radius, or the length of movementof the cross-head 21. The wrist pin 36 is on a shaft-head or disk 37having a hollow hub 38 mounted on the end of a driving-shaft 39 andsecured to said shaft by a set-screw $0 or any other suitable means. hedriving-shaft 39 mounted in bearings 41 and 42 which rise from the base2 and are s cured thereto by bolts 13. The wrist-pin is adjustableradially with respect to the axis of the driving-shaft by means of ascrew 44 the outer end of which is mounted against longitudinal movementin a plate 45 secured by screws 16 to the member 37 and curved tocorrespond with the curvature of said member. The inner end of the:-crew e'l-fiis swivcled onto a bearing 17 which is mounted in a channel48 extending radially in said head 37. By turning the screw 1 the throwof the wrist-pin may be varied and the extent of movement of the spindle7 nicely adjusted for the purpose of properly mashing or slightlyheading the rivet and to adjust the movement of said rivet with the aidof the adjustment provided for the spindle 3. so as to position therivet properly in the rivet-holes of the rule sections.

To the bearing 41 is secured a disk 19, the latter being fastened to thebearing by means of bolts or screws 50 50. In this disk is an opening 51through which the shaft 39 passes. The disk 1-9 serves as abearingmember and to it, at 52, is fulcrumed a lever 53 which may beoperated by foot power or any suitable or convenient means (not shown).A belt-pulley 5% is loosely mounted on the shaft 39 and is provided witha hub in the rim of which are a series of horizontal notches 5G, 56 tobe engaged by a slide-key or movable spline 57 which is mounted in aslot 58 formed in the inner periphery of a collar 59 secured by means ofa key 60 to the shaft 39. The inner end of the slide-key 57 is placedunder pressure of a spring 61 seated in a bore in the collar projectingfrom the bottom of the key seat, or the inner end of the latter. Thisspring 61 tends to force the slide key 57 outwardly so as to engage itwith one of the notches 56 and thus connect the pulley 54 with the shaft39. The slide-key 57 is normally held. out of such engagement with thepulley 5st by means of a finger or spur 62 which projects from the leverand engages a transverse slot 63 in the slide-key. This slot has abeveled surface or inclined wall 64 whose inclination is at an angle tothe path of movement of the spur on the lever and is engaged by thelatter which also has a beveled surface 65 which contacts with thebeveled side 64 of the slide-key. When this spur is withdrawn from theslot 63 the spring 61 forces out the slide-key into engagement with oneof the notches The spur 62 is normally held in engagement with the slotof the key 57 and thus the latter held out of engagement with the hub ofthe pulley. by means of a spiral spring 66, one end of which is securedto a stud 67 projecting from the top of the lever 53 while the other endis secured to a similar tud (38 projecting from the face of thebearing-disk 49. An adjustable stop is provided for the upper end of thelever to gage the inward movement of the spur in its engagement with theslide-key, which stop consists of a screw 69 mounted in a lug 70extending from the face of the bearing-disk as. The

upper end of the lever 53 normally lies in' an annular groove 71 formedin the collar 59, as shown in Figs. 1, 2 and 5. As shown in Fig. 3 theedge of the lever engaging this groove is curved in conformity with thecurvature of the collar.

In operating the machine the operator hangs the rule sections 6 and 6 onthe spindle 3 by passing said spindle through the rivet or pivot holesin the ends of the said sections, a permanent rivet is then inserted inthe bore 5 of the rivet or pivot holder 4:. The lever 53 is then movedto withdraw its spur 62 from its engagement with the slidekey 57, whichpermits the spring 61 to push the key into engagement with the firstnotch 56 that happens to be rotated into alinement with the key. This,as previously explained, imparts motion to the shaft 39, pitman 35 andcrosshead 21, which carries forward the rivet-holding member a andspindle 7 with the permanent rivet. The latter when it meets the spindle3 forces the spindle out of the rivet holes in the rule sections. Thatportion of the rivet which is held in the bore 5 is also permitted toadvance into the rule sections, because when the tip of the rivet-holder1 strikes the rule its motion is arrested while the spindle 7 continuesto advance against the tension of the spring 33 until the tip of saidspindle is about flush with the tip of the holder 1, at which moment thetip of the spindle 3 will be out of the rivet holes in the rulesections, its stop 12 resisted by the plug 13. and the rivet endssubstantially flush with the opposite sides of the jointed rulesections. A slight additional movement will then cause the tips of thespindles 3 and 7 to check or partly rivet the opposite ends of the rivetor pivot. This done the forward movement of the crosshead is completedand on its return the jointed rule sections will dro) down into asuitable receptacle below lnot shown) from whence they can be removedfor further operation.

IVhile the foregoing has explained a temporary riveting operation it isobvious that the same mechanism is capable of completing the heading ofthe rivets by providing rivets of suitable material and tips for thespindles 3 and 7 particularly suited to form complete heads under thepressures which they are caused to exert.

the degree of crushing force applied to the rivet ends is controlled bythe adjustment radially of the wrist'pin 36 as to the spindle 7, andadjustment of the plug 13 as to the spindle 3. The motion of the shaftis automatically stopped at the end of its single rotation by the spuron the lever lying in the path of the slide-key, so that when the latteris revolved to its starting point it is engaged by the spur and forcedout of engagement with the pulley, so all the operator need do is tostart the motion by a momentary pressure upon the lever, the stopping atthe right point taking place without any further effort on the operatorspart. The operations of inserting and heading rivets may thus beaccomplished with great rapidity as all the operator needs to do is toinsert a rivet in the holder l mount the rule sections on the spindle 3and step on a treadle or other device to actuate the lever 53. Thespindle 3 I term the mounting-pin and the spindle 7 the punch or headingpin, each being, as shown, mounted within socket members formed by theupper and lower plate cavities within which the springs for the punch 3and the rivet-holding socket t are, respectively, mounted.

I claim as my invention 1. In a machine of the class described, thecombination with a spindle adapted to temporarily mount a rule-joint, ofa rivet-holdmg device, a spindle movable against a rivet in said device,and means for moving same.

2. In a machine of the class described, in combination, a movablemounting pin adapted to serve as a temporary pivot, a rivetholdingsocket, a punch movable into said socket, and means for moving saidpunch to force a rivet out of said socket against said mounting-pin.

3. In a machine of the class described, the combination with ayieldingly mounted mounting-pin, of a slide, a rivet-punch mounted onsaid slide, a rivet-holding socket mounted in line with said punch,means for reciprocating said slide, and automatic means for stopping themotion of the slide at the completion of each forward and returnmovement.

4:. In a machine of the class described, the combination with alongitudinally movable mounting-pin, of means for adjusting the extentof movement of said pin, a punch, a slide upon which said punch ismounted, means for temporarily supporting a rivet in alinement with saidpunch, and means for moving said punch to force a rivet against saidmounting-pin.

5. In a machine of the class described, the combination with amounting-pin yieldingly mounted, of means for adjusting its normalposition, a slide, a punch mounted on said slide in alinement with saidpin, a rivet holding socket adapted to support a rivet temporarily andmounted concentrically with said punch, means for reciprocating saidpunch, means for adjusting the stroke of its reciprocal movement, andmeans for stopping such movement automatically.

6. In a machine of the class described, the combination with a base, ofa socket-member, a movablespring-pressed spindle mounted in said socketand adapted to engage the rivet-holes of a rule-joint, a cross-head, apunch mounted on said cross-head, a springpressed rivet-supportingsocket Within which the end of said punch is mounted, a means forreciprocating said cross-head, means for varying the length of stroke ofthe reciprocal movement of said cross-head, a shaft, a pulley rotatablymounted on said shaft, means for connecting said shaft to rotate Withsaid pulley, and means Which automatically disconnect said shaft andpulley at the end of each complete reciprocal move- 10 ment.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing

